Hornito

Hornitos ( from Spanish: little stove) are chimney-like or chimney -like eruption cones that are formed when a lava flow from rising lava is forced through the already solidified crust upward.

Hornitos are usually only a few feet high, but can be up to 20 m high and often have very steep edges, so that they resemble turrets. This is called a hornito a " rootless " cinder cone, because he is fed only by the lava flowing underneath, not from a deep -reaching vent. Often sits a number of Hornitos in the flow direction on a lava flow or extends over a lava tube. Hornitos are often short-lived structures and fall after the cessation of the lava flow or change its flow direction soon collapses.

Examples of Hornitos can be found in the crater of Ol Doinyo Lengai in Tanzania, at Puu Oo, Hawaii, on Etna in Sicily and on Erta Ale in Ethiopia. Very numerous Hornitos is also found in Aðaldalur in the north of Iceland, they are about 2500 years old.